3M(TM) Heat Shrinkable Thick-Wall Cable Sleeve ITCSF-0400-BK-48A-MSHA Black, 12-6 AWG, 4 ft lengths 3M(TM) ITCSF heat shrinkable cable sleeves, rated to 1 kV, provide reliable performance for electrical splices, connections and terminations, as well as mechanical and environmental protection. This cable sleeve comes in 4 ft lengths. 3M(TM) ITCSF heat shrinkable thick wall cable sleeves are made from flame retardant, polyolefin. They are flexible, highly split resistant and fast shrinking to provide rapid installation. The 48 inch sleeves come standard with a factory- applied adhesive/sealant.